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I'm trying a build of 2.4.5pre5 without the knfsd or the ide patches and
will see if this still happens. My only other local changes should all be
innocuous:

--- drivers/char/console.c.orig Sat Apr 7 13:40:41 2001
+++ drivers/char/console.c Sat Apr 7 13:41:27 2001
@@ -2678,7 +2678,9 @@

static void blank_screen(unsigned long dummy)
{
+#if 0 /* don't ever blank */
timer_do_blank_screen(0, 1);
+#endif
}

void poke_blanked_console(void)
--- net/ipv4/tcp_ipv4.c.orig Sat Apr 7 13:50:29 2001
+++ net/ipv4/tcp_ipv4.c Sat Apr 7 13:50:31 2001
@@ -96,7 +96,7 @@
* For high-usage systems, use sysctl to change this to
* 32768-61000
*/
-int sysctl_local_port_range[2] = { 1024, 4999 };
+int sysctl_local_port_range[2] = { 1024, 9999 };
int tcp_port_rover = (1024 - 1);

static __inline__ int tcp_hashfn(__u32 laddr, __u16 lport,
--- include/linux/fs.h.orig Sat Apr 7 13:44:56 2001
+++ include/linux/fs.h Sat Apr 7 13:46:23 2001
@@ -64,8 +64,8 @@
extern int max_super_blocks, nr_super_blocks;
extern int leases_enable, dir_notify_enable, lease_break_time;

-#define NR_FILE 8192 /* this can well be larger on a larger system */
-#define NR_RESERVED_FILES 10 /* reserved for root */
+#define NR_FILE 262140 /* this can well be larger on a larger
system */
+#define NR_RESERVED_FILES 128 /* reserved for root */
#define NR_SUPER 256

#define MAY_EXEC 1
--- include/linux/sem.h.orig Sat Apr 7 13:47:13 2001
+++ include/linux/sem.h Sat Apr 7 13:47:15 2001
@@ -66,7 +66,7 @@
#define SEMMNI 128 /* <= IPCMNI max # of semaphore
identifiers */
#define SEMMSL 250 /* <= 8 000 max num of semaphores per id */
#define SEMMNS (SEMMNI*SEMMSL) /* <= INT_MAX max # of semaphores in system
*/
-#define SEMOPM 32 /* <= 1 000 max num of ops per semop call */
+#define SEMOPM 128 /* <= 1 000 max num of ops per semop call */
#define SEMVMX 32767 /* <= 32767 semaphore maximum value */

/* unused */


> -----Original Message-----
> From: Neulinger, Nathan
> Sent: Wednesday, May 23, 2001 12:11 PM
> To: 'linux-kernel@vger.kernel.org'
> Subject: lot's of oops's on 2.4.4 in d_lookup/cached_lookup
>
>
> I've got a system monitoring box, running 2.4.4 with a few
> patches (ide, inode-nr_unused, max-readahead, knfsd, and a
> couple of basic tuning opts w/o code changes). Basically, the
> server runs anywhere from a few hours to a few days, but
> always seems to get to a point where it gets tons of the
> following type of oops. It is almost ALWAYS in d_lookup. It's
> not always the same script, but generally is one of a set of
> scripts that get run repeatedly every few minutes. check-all
> is a shell script that just runs a set of local commands
> (/local/sysmon/check-XXXX.pl hostname args).
>
> The machine is running afs, but the call traces don't appear
> to be in afs code.
>
> Any ideas on what might be causing this?
>
> Machines been checked with memtest86 all-tests, and came out
> clean. It's a PIII-500 w/ 512MB, drives are on a promise
> ultra100, but drives are ultra66.
>
> Please cc replies.
>
> -- Nathan
>
> May 23 10:53:44 sysmon kernel: Unable to handle kernel paging
> request at virtual address 96000000
> May 23 10:53:44 sysmon kernel: c01409f0
> May 23 10:53:44 sysmon kernel: *pde = 00000000
> May 23 10:53:44 sysmon kernel: Oops: 0000
> May 23 10:53:44 sysmon kernel: CPU: 0
> May 23 10:53:44 sysmon kernel: EIP: 0010:[d_lookup+100/260]
> May 23 10:53:44 sysmon kernel: EIP: 0010:[<c01409f0>]
> May 23 10:53:44 sysmon kernel: EFLAGS: 00010293
> May 23 10:53:44 sysmon kernel: eax: c19a2108 ebx: 95ffffe8
> ecx: 00000010 edx: c1980000
> May 23 10:53:44 sysmon kernel: esi: 0022f9f5 edi: d582dcb0
> ebp: 96000000 esp: d582dc4c
> May 23 10:53:44 sysmon kernel: ds: 0018 es: 0018 ss: 0018
> May 23 10:53:44 sysmon kernel: Process check-all (pid: 7409,
> stackpage=d582d000)
> May 23 10:53:44 sysmon kernel: Stack: 0022f9f5 c1890320
> d582dcb0 cee07cad c19a2108 cee07ca9 0022f9f5 00000003
> May 23 10:53:44 sysmon kernel: c0138894 c1890320
> d582dcb0 0022f9f5 c0138cf8 c1890320 d582dcb0 00000004
> May 23 10:53:44 sysmon kernel: d582dd50 c1890320
> dfcb8b20 cee07ca8 d582c000 00000001 d582c000 00000001
> May 23 10:53:44 sysmon kernel: Call Trace:
> [cached_lookup+16/84] [path_walk+548/2076]
> [vfs_follow_link+251/376] [ext2_follow_link+23/28]
> [path_walk+905/2076] [open_exec+39/196] [load_script+411/480]
> May 23 10:53:44 sysmon kernel: Call Trace: [<c0138894>]
> [<c0138cf8>] [<c013b58b>] [<c0152dfb>] [<c0138e5d>]
> [<c0136eab>] [<c01445bb>]
> May 23 10:53:44 sysmon kernel: [<c0144420>]
> [<c0122802>] [<c0128980>] [<c0129935>] [<c01375ed>]
> [<c013787c>] [<c0137893>] [<c0105933>]
> May 23 10:53:44 sysmon kernel: [<c0106be3>]
> May 23 10:53:44 sysmon kernel: Code: 8b 6d 00 8b 74 24 18 39
> 73 48 75 7c 8b 74 24 24 39 73 0c 75
>
> >>EIP; c01409f0 <d_lookup+64/104> <=====
> Trace; c0138894 <cached_lookup+10/54>
> Trace; c0138cf8 <path_walk+224/81c>
> Trace; c013b58b <vfs_follow_link+fb/178>
> Trace; c0152dfb <ext2_follow_link+17/1c>
> Trace; c0138e5d <path_walk+389/81c>
> Trace; c0136eab <open_exec+27/c4>
> Trace; c01445bb <load_script+19b/1e0>
> Trace; c0144420 <load_script+0/1e0>
> Trace; c0122802 <do_generic_file_read+57a/588>
> Trace; c0128980 <free_shortage+1c/104>
> Trace; c0129935 <__alloc_pages+cd/2c0>
> Trace; c01375ed <search_binary_handler+65/17c>
> Trace; c013787c <do_execve+178/1e8>
> Trace; c0137893 <do_execve+18f/1e8>
> Trace; c0105933 <sys_execve+2f/60>
> Trace; c0106be3 <system_call+33/40>
> Code; c01409f0 <d_lookup+64/104>
> 00000000 <_EIP>:
> Code; c01409f0 <d_lookup+64/104> <=====
> 0: 8b 6d 00 mov 0x0(%ebp),%ebp <=====
> Code; c01409f3 <d_lookup+67/104>
> 3: 8b 74 24 18 mov 0x18(%esp,1),%esi
> Code; c01409f7 <d_lookup+6b/104>
> 7: 39 73 48 cmp %esi,0x48(%ebx)
> Code; c01409fa <d_lookup+6e/104>
> a: 75 7c jne 88 <_EIP+0x88>
> c0140a78 <d_lookup+ec/104>
> Code; c01409fc <d_lookup+70/104>
> c: 8b 74 24 24 mov 0x24(%esp,1),%esi
> Code; c0140a00 <d_lookup+74/104>
> 10: 39 73 0c cmp %esi,0xc(%ebx)
> Code; c0140a03 <d_lookup+77/104>
> 13: 75 00 jne 15 <_EIP+0x15>
> c0140a05 <d_lookup+79/104>
>
>
> ------------------------------------------------------------
> Nathan Neulinger EMail: nneul@umr.edu
> University of Missouri - Rolla Phone: (573) 341-4841
> Computing Services Fax: (573) 341-4216
>
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